You have a list of n open intervals(a1, b1), (a2, b2), . . . , (an, bn) on the real line. (An open interval(a, b) comprises all the points strictly between its endpoints a and b, i. e., (a, b) = {x| a

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a macro is a tool that allows you to automate tasks and add functionality to your forms, reports, and controls. for example, if you add a command button to a form, you associate the button's onclick event to a macro, and the macro contains the commands that you want the button to perform each time it is clicked.

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